Bed-spring.



C. A. CHALMER.

BED SPRING.

vAPPLICATION FILED JUNE 5. |914.

Patented Apr. 13, 1915.

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C. A. C-HALKER. BED SPRING.

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CHARLES A. CHALKER, OF TRAVERSE CITY, MCHIGAN.

BED-SPRING.

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Specification of Letters Patent.

Patented Api'. f3, i915.

Application led June 5, 1914. Serial No. 843,251.

To all whom it may concern Be it known that l, CHARLES A. CHALKER, acitizen of the VUnited States, residing at Traverse City, in the countyof Grand Traverse and State of Michigan, have invented new and usefullmprovements in Bed-Springs, of which the following is a specification.I

This invention relates to bed springs and more particularly to means forautomatically or manually tightening said springs.

One of the principal objects of the invention is the provision of a bedspring which will automatically tighten itself upon application ofweight thereto and which will also be manually tightened when desired.

Further objects of the invention will appear as the followingdescription is read in connection with the accompanying drawing, whichforms a part of this application, and in which z- Figure 1 is a topplanview. Fig. 2 is a side elevation. Fig. 3 is a vertical sectionalview on the line 3-3 of Fig. 2. Fig. l is a detail perspective view ofvone end of one of the spring rollers. Fig. 5 is a perspective View of aratchet cap. Fig. 6 is a side elevation of one of the levers.

Referring more particularly to the drawing, the frame of the bed springcomprises side rails 1 and 2 and end rails 3 and 4 which are boltedthereto, as is customary, a wooden frame being here shown. lt is to beunderstood, however, that metallic frames may be employed wheneverdesired.

Mounted upon the side rails 1 and 2 adjacent each of the cross rails arestandards having shoulders 6 to rest upon the rail and depending flanges7 secured to the rail by bolts 8 and by the hook 9 which enters anaperture 10 in the rail. The upper end of each standard is provided withan arcuate slot 11 which is inclined from its bottom to its top awayfrom the cross bars 3 and 4.

The spring fabric indicated at 12 may be constructed in any suitablemanner and has its opposite end edges attached to rollers 13. Theserollers are grooved upon their outer ends, as shown at 14, and coveringthe grooved ends are ratchet caps having ribs 16 to enter the grooves,the caps being secured to the rollers by screws, bolts or other suitabledevices indicated at 17. The outer end of the cap is provided with aratchet wheel 18 from which projects a concentric boss 19 upon which theactuating lever 20 is journaled. This actuating lever is provided with aiiange 21 which abuts against the cap 15 and within the confines of theflanges 21 is pivoted a pawl 22 arranged to engage the teeth of theratchet wheel 18.

The boss 19 projects through the lever and is slidably and rotatablymounted in the slot 11, being held against displacement by a bolt andwasher 23 and 24, the latter overlapping the side slot, as shown. Thelower side of the lever is provided with a rounded surface 25 to bearupon the rails 1 and 2 and so that it will slide over said rails withlittle friction. The boss 19 rests upon a bearing 26 which is slidablymount ed in the slot 11 and is supported upon a spiral spring 27 whoselower end is held against disengagement by a lug 28.

TWhen weight is applied to the spring the same will sag slightly andcause a depression of the ends of the rollers 13 inthe standards so thatas they are depressed against the tension of the springs 27 the outerends of the levers will move upwardly relatively and turn the rollers ina direction to wind the spring thereon. When the spring becomesconsiderably sagged one of the levers at one side of the bed may beraised by a lever at the opposite side of the bed and remain instationary position, thus the pawl will drop into the next lowest tooth.The lever raised may then be dropped which will cause its pawl to dropin the neXt lowest tooth. This operation may be carried out as manynumber of times as may be found desirable.

What is claimed is 1. A bed spring comprising a frame, standards carriedthereby, a spring fabric, means connected to the spring fabric andslidably mounted in the standards, and means for automatically actuatingsaid laste named means to tighten the spring when weight is applied tothe spring fabric.

2. ln a bed spring, a frame, standards carried thereby and havinginclined slots, a spring fabric, means connected to opposite ends of thespring fabric and slidably mounted in the slots, and means forautomatically operating said last-named means to tighten the spring whenweight is applied to the spring fabric.

3. In a bed spring, a frame, slotted stand ards carried by the frame,rollers slidably and rotatably mounted in the standards, a spring fabricconnected to the rollers, and

means forI automatically turning the rollers to ktighten the spring whenWeight is applied to the fabric. Y

4. In a bed spring, a frame, standards carried by the frame and havinginwardly inclined slots, rollers rotatably and slidably mounted intheslots, a spring fabric connected to the rollers and adapted to be Woundthereon, said spring fabric holding the rollers in the upper end of theslots, said slots adapted to stretch the fabric When the rollers aredepressed therein by weight upon the fabric, and means for Winding thefabric on the rollers when Weight is applied to the fabric.

5. In a bed spring, a frame, slotted standards mounted upon the frame,rollers slidably and yrotatably mounted in the standards, spring fabricconnected to the rollers, and levers operatively connected to therollends of the rollers, levers journaled on the 3o rollers and having apawl to engage the ratchet Wheels, said levers engaged with the frameand a spring fabric connected to the rollers and adapted to be Woundthereon.

In testimony whereof I aiiix my signature 3F in presence of twowitnesses.

CHARLES A. CHA LKER. Vitnesses:

CHAs. B. DYE, JAMES H. MONROE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). 0'.

